White enamel.



UNITED STATES PATENT OFFICE.

IGNAZ KBEIDL, OF VIENNA, AUSTRIA-HUNGARY.

WHITE ENAMEL.

No Drawing.

To all whom it may concern Be it known that I, IGNAZ KREIDL, partner of the firm Vereinigte chemische Fabriken, Landau, Kreidl, Heller & 00., of Sebastian- Kohlgasse 5-7, Vienna, XXI, Austria-Hungary, a subject of the Emperor of Austria- Hungary, residing at Sebastian-Kohlgasse 5-7, Vienna, XXI, in the Empire of Austria-Hungary, have invented a new and usepurposes, which hydrates contain alkali.

In my later application for Letters Patent 1 Ser. No. 721349 of the 20 Sept, 1912, a process for the manufacture of white zirconium enamels is described which consists in the employment of anhydrous zirconium compounds poor in alkali as clouding agents instead of alkaline hydrates of zirconium compounds.

I have now found that the most succesful covering effects are obtained withthese alkaline or weak alkaline clouding agents if they contain from 2-7 of alkal metal, preferably between 3 and 4%. The most suitable percentage of alkali ranging within the aforementioned limits can be easily deter- Specification of Letters Patent.

Application filed October 30, 1912. Serial No. 728,558.

Patented Now 17, 1914.

mined empirically for each separate compound used for clouding purposes.

What is claimed is: 1. A white enamel containing, as a clouding agent, a metal compound suitable for clouding purposes in combination with alkali, the content of 'alkali metal being be tween 2% and 7%.

2. A white enamel containing, as a clouding agent, a zirconium composition containing between 2% and 7% alkali metal.

3. A white enamel containing, as aclouding agent, a metal compound suitable for clouding purposes in combination with alkali, the content of alkali metal being between 3% and 4%. v

4. white enamel containing, as a clouding agent, a zirconium composition containing between 3% and 4% alkali metal.

5. A white enamel containing, as a clouding agent, a metal oxid' suitable for clouding purposes in combinationwith alkali, the content of alkali metal being between 2% and o. 6. A white enamel containing, as clouding agent, a compound suitable for cloudin purposes in combination with silicic aci and alkali, the content of alkali metal being between 2% and 7 In testimony whereof I have signed my name to this specification in'the presence of two subscribing witnesses. IGNAZ KREIDL. Witnesses Hueo Ram, AUGUST Fuoenn. 

